5
TECHNICAL NOTES
2 + 2 Decode:
Two MTSD-3 modules can be “anded” together to do 2 + 2 decoding, such as Motorola Quick Call
1 or AvCall. Follow the steps below to set up 2 MTSD-3 modules for 2 + 2 decoding:
1. Lift and isolate the emitter leg of Q3 on the first MTSD-3 from ground.
2. Solder the Horn Output wire (P1-10 Gray/White wire) from the second MTSD-3 to the emitter leg of Q3 on
the first MTSD-3.
3.
Connect the Horn Output wire (P1-10 Gray/White wire) on the first MTSD-3 to the desired relay or
equipment.
4. When both units decode simultaneously the ground path is completed and the Horn Output on Unit 1 goes
momentarily (~3 seconds) to ground.
MIDIAN CONTACT INFORMATION
Midian Electronics Inc.
2302 East 22
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Street
Tucson, Arizona 85713 USA
Orders:
1-800-MIDIANS
Phone:
520-884-7981
Fax:
520-884-0422
E-mail:
Web:
Содержание MTSD-3
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